IRAR
| Acronym | Definition |
|---|---|
| IRAR | Instituto Regulador de Águas e Resíduos (Portuguese: Institute for the Regulation of Water and Waste) |
| IRAR | International Registration Authority for Roses |
| IRAR | Infrared Airborne Radar |
| IRAR | Immunization Registry Annual Report (US CDC) |
| IRAR | Interim Remedial Action Report (US Army) |
| IRAR | Infarct-Related Artery Recanalization (heart attack research) |